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Art of lattice and gravity waves from preheating

Zhiqi Huang

  • CEA, Institut de Physique Théorique, 91191 Gif-sur-Yvette cédex, France

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Phys. Rev. D 83, 123509 – Published 7 June, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.123509

Abstract

The nonlinear dynamics of preheating after early-Universe inflation is often studied with lattice simulations. In this work I present a new lattice code HLattice. It differs from previous publicly available codes in the following three aspects: (i) A much higher accuracy is achieved with a modified sixth-order symplectic integrator; (ii) scalar, vector, and tensor metric perturbations in synchronous gauge and their feedback to the dynamics of scalar fields are all included; (iii) the code uses a projector that completely removes the scalar and vector components defined by the discrete spatial derivatives. Such a generic code can have a wide range of applications. As an example, gravity waves from preheating after inflation are calculated with a better accuracy.

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Phys. Rev. D 83, 123509– Published 7 June, 2011
  • Received 1 February 2011

© 2011 American Physical Society

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